From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx124.postini.com [74.125.245.124]) by kanga.kvack.org (Postfix) with SMTP id DE49E6B0069 for ; Wed, 13 Jun 2012 06:28:10 -0400 (EDT) Received: from /spool/local by e28smtp05.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 13 Jun 2012 15:58:07 +0530 Received: from d28av01.in.ibm.com (d28av01.in.ibm.com [9.184.220.63]) by d28relay01.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q5DAS3tZ11534658 for ; Wed, 13 Jun 2012 15:58:04 +0530 Received: from d28av01.in.ibm.com (loopback [127.0.0.1]) by d28av01.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q5DFvYDu032625 for ; Wed, 13 Jun 2012 21:27:38 +0530 From: "Aneesh Kumar K.V" Subject: [PATCH -V9 03/15] hugetlb: add an inline helper for finding hstate index Date: Wed, 13 Jun 2012 15:57:22 +0530 Message-Id: <1339583254-895-4-git-send-email-aneesh.kumar@linux.vnet.ibm.com> In-Reply-To: <1339583254-895-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> References: <1339583254-895-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org, kamezawa.hiroyu@jp.fujitsu.com, dhillf@gmail.com, rientjes@google.com, mhocko@suse.cz, akpm@linux-foundation.org, hannes@cmpxchg.org Cc: linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, "Aneesh Kumar K.V" From: "Aneesh Kumar K.V" Add an inline helper and use it in the code. Acked-by: David Rientjes Acked-by: Michal Hocko Reviewed-by: KAMEZAWA Hiroyuki Signed-off-by: Aneesh Kumar K.V --- include/linux/hugetlb.h | 6 ++++++ mm/hugetlb.c | 20 +++++++++++--------- 2 files changed, 17 insertions(+), 9 deletions(-) diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index d5d6bbe..217f528 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -302,6 +302,11 @@ static inline unsigned hstate_index_to_shift(unsigned index) return hstates[index].order + PAGE_SHIFT; } +static inline int hstate_index(struct hstate *h) +{ + return h - hstates; +} + #else struct hstate {}; #define alloc_huge_page_node(h, nid) NULL @@ -320,6 +325,7 @@ static inline unsigned int pages_per_huge_page(struct hstate *h) return 1; } #define hstate_index_to_shift(index) 0 +#define hstate_index(h) 0 #endif #endif /* _LINUX_HUGETLB_H */ diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 34a7e23..b1e0ed1 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1646,7 +1646,7 @@ static int hugetlb_sysfs_add_hstate(struct hstate *h, struct kobject *parent, struct attribute_group *hstate_attr_group) { int retval; - int hi = h - hstates; + int hi = hstate_index(h); hstate_kobjs[hi] = kobject_create_and_add(h->name, parent); if (!hstate_kobjs[hi]) @@ -1741,11 +1741,13 @@ void hugetlb_unregister_node(struct node *node) if (!nhs->hugepages_kobj) return; /* no hstate attributes */ - for_each_hstate(h) - if (nhs->hstate_kobjs[h - hstates]) { - kobject_put(nhs->hstate_kobjs[h - hstates]); - nhs->hstate_kobjs[h - hstates] = NULL; + for_each_hstate(h) { + int idx = hstate_index(h); + if (nhs->hstate_kobjs[idx]) { + kobject_put(nhs->hstate_kobjs[idx]); + nhs->hstate_kobjs[idx] = NULL; } + } kobject_put(nhs->hugepages_kobj); nhs->hugepages_kobj = NULL; @@ -1848,7 +1850,7 @@ static void __exit hugetlb_exit(void) hugetlb_unregister_all_nodes(); for_each_hstate(h) { - kobject_put(hstate_kobjs[h - hstates]); + kobject_put(hstate_kobjs[hstate_index(h)]); } kobject_put(hugepages_kobj); @@ -1869,7 +1871,7 @@ static int __init hugetlb_init(void) if (!size_to_hstate(default_hstate_size)) hugetlb_add_hstate(HUGETLB_PAGE_ORDER); } - default_hstate_idx = size_to_hstate(default_hstate_size) - hstates; + default_hstate_idx = hstate_index(size_to_hstate(default_hstate_size)); if (default_hstate_max_huge_pages) default_hstate.max_huge_pages = default_hstate_max_huge_pages; @@ -2687,7 +2689,7 @@ retry: */ if (unlikely(PageHWPoison(page))) { ret = VM_FAULT_HWPOISON | - VM_FAULT_SET_HINDEX(h - hstates); + VM_FAULT_SET_HINDEX(hstate_index(h)); goto backout_unlocked; } } @@ -2760,7 +2762,7 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, return 0; } else if (unlikely(is_hugetlb_entry_hwpoisoned(entry))) return VM_FAULT_HWPOISON_LARGE | - VM_FAULT_SET_HINDEX(h - hstates); + VM_FAULT_SET_HINDEX(hstate_index(h)); } ptep = huge_pte_alloc(mm, address, huge_page_size(h)); -- 1.7.10 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org